In System Info in 11.10, the graphics driver wasn't detected. I use ACER Aspire 4750 with Intel Core i3-2340M and Intel HD Graphics 3000 graphic card
How to install the driver for my Ubuntu?
The Intel cards are automatically detected and installed in Ubuntu, no need to install further drivers. See this question if you want them to be recognised in System Info.
However, if you feel that you want to install a more recent driver (I dont recommend this if you do not know how to recover from a broken graphics driver) you can add the xorg-edgers fresh X crack PPA and update your system with the packages from there.
To do that open a terminal and use these commands
sudo add-apt-repository ppa:xorg-edgers/ppa sudo apt-get update && sudo apt-get upgrade
Again, do this only this with extra caution!
The Intel Graphics Update Tool for Linux allows you to easily install the latest graphics and video drivers for your Intel graphics hardware. This allows you to stay current with the latest enhancements, optimizations, and fixes to the Intel Graphics Stack to ensure the best user experience with your Intel graphics hardware. The Intel Graphics Update Tool for Linux was available for the latest LTS version of Ubuntu at the time this answer was posted.
Thanks to Shahe Tajiryan.